Sorry, JavaScript must be enabled.Change your browser options, then try again.
Show ONLY:
Collection type:
Licence type:
Category:
Person:
Project:
Showing results for: [ Zhang, Songbo ]
We propose to monitor the potential repeating FRBs in the Southern Sky with luminosity di- chotomy criterion. With a success of luminosity-guided detection of a repeating source by FAST, we can contin... moreue to search for more repeaters hidden in current FRB sample according to luminosity dichotomy. Specifically, we select FRB 171020 and FRB 180923 as the targets of proposed obser- vations, which are located in the repeater population in the luminosity function. We demonstrate that the observing with 20 hours for each source is optimistic using Parkes ultra-wide-bandwidth receiver (UWL), if there are repeaters among them.less
Australia Telescope National Facility - P1062 - Monitoring the repeating FRB candidates in the Southern Sky - Published 27 Sep 2020
The Parkes Pulsar Timing Array (PPTA) project has three primary goals: (a) detection of gravitational waves from astronomical sources, (b) establishment of a pulsar timescale, and (c) improvement of o... moreur understanding of Solar-system dynamics. The PPTA is the oldest of three international pulsar timing groups. We have the smallest telescope and the smallest group, but the best measurements and the best results. Our bound on the strength of the incoherent gravitational wave background is the only bound which significantly constrains theoretical models. We have maintained our leading position because: we have the southern sky; we have a small but well-focussed group; we have the best-calibrated receivers; and we have been able to observe with an almost regular cadence of 15 to 20 days over a wide bandwidth. With this proposal we aim to maintain our pre-eminent position in the field. Unlike most observing proposals, this is a continuing proposal for which the observations will continue to improve bounds on ultra-low-frequency gravitational waves until they are finally detected. Continued Parkes observations will remain valuable at least until the first stage of the SKA is able to improve on our sensitivity and observing cadence. Even after the gravitational wave background is detected we will want to continue observations in support of the nascent field of gravitational wave astronomy!less
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 19 Sep 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 03 Sep 2020
This collection contains data files from the Ultra-Wideband Low (UWL) receiver system of the Parkes radio telescope for the pulsar PSR J1803−3002A, which is within the globular cluster NGC 6522. This ... moredata collection contains (1) the integrated profiles for each of the observations and the same after flagging the radio frequency interference (with the file extension .zap and .calib_zap), and (2) the timing model file of PSR J1803−3002A (with the file extension .par).less
ATNF Science – Astronomy Research - - Published 26 Aug 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 22 Aug 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 21 Jul 2020
Australia Telescope National Facility - P1062 - Monitoring the repeating FRB candidates in the Southern Sky - Published 26 Jun 2020
We have re-processed all the observations in the Parkes pulsar data archive obtained during the first four years of the Parkes multibeam receiver and have discovered two new FRBs and five single pulse... more candidates (SPCs) from unknown sources, but with Galactic dispersion measures. These signals were only detected in a single beam of the receiver suggesting that they are unlikely to be terrestrial. There are no known pulsars in the pointing direction of the five SPCs and therefore are likely giant pulses from currently unknown pulsars. Using the Ultra Wideband Low (UWL) receiver we have opportunity to detect repeating signals from the two FRBs and to confirm the five SPCs. As all these signals were detected in the 20 cm band, the UWL provides the opportunity to observe stronger emission in other observing bands.less
Australia Telescope National Facility - P1040 - Follow-up observations of transient events detected in the Parkes data archive - Published 25 Jun 2020
We propose observations with the ultra-wide-bandwidth, low frequency receiver (UWL) installed at the Parkes telescope to carry out single pulse study of millisecond pulsars. We have selected two of th... moree brightest pulsars that are regularly observed by the Parkes Pulsar Timing Array. Our observations will enable statistical properties study of single pulses with ultra-wide-bandwidth, measuring jitter noise level of the linear and circular polarization states as well as in the total intensity signal, measuring jitter bandwidth and how jitter noise decorrelates with frequency. The UWL receiver, with its much wider bandwidth, will provide unique opportunity for study of jitter noise evolution with frequency.less
Australia Telescope National Facility - P1043 - Single pulse study of millisecond pulsars using the Parkes wideband receiver - Published 25 Jun 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 31 May 2020
Australia Telescope National Facility - P1062 - Monitoring the repeating FRB candidates in the Southern Sky - Published 30 May 2020
The Parkes Ultra-wide-bandwidth receiver enables, for the first time with the Parkes telescope, a commensal high time and high frequency resolution survey. We will observe Baade's window in which we ... moreare guaranteed detections of pulsars and spectral lines. Our science drivers are diverse and range from understanding scattering, to detecting new pulsars, to searching for galaxies in the zone of avoidance, probing the globular cluster at the centre of the window and studying OH circumstellar masers and CO-dark molecular gas. The observing strategy and processing software developed for this survey will be applicable to all future Parkes surveys with the wide-band receiver or cyrogenically-cooled phased array feed.less
Australia Telescope National Facility - P1067 - A wide-band survey of Baade's Window in the time and frequency domains - Published 29 May 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 08 May 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 26 Apr 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 11 Apr 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 31 Mar 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 24 Mar 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 16 Mar 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 13 Mar 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 23 Feb 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 22 Feb 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 21 Feb 2020
